The figure (Image from the web) shows two identical copper blocks of mass m =1.5 kg: block L at temperature T iL = 60°C and block R at temperature T iR = 20°C. The blocks are in a thermally insulated box and are separated by an insulating shutter. When we lift the shutter, the blocks eventually come to the equilibrium temperature T f = 40°C. What are the entropy change Δ S L of the block L, the entropy change Δ S R of the block R, and the net entropy change Δ S of the two-block system during this irreversible process? The specific heat of copper is 386 J/kg.K.
A.
Δ S L = 35.86J/K, Δ S R = 38.23J/K , Δ S = 2.37J/K
B.
Δ S L = 35.86J/K, Δ S R = -38.23J/K , Δ S = 2.37J/K
C.
Δ S L = -35.86J/K, Δ S R = 38.23J/K , Δ S = -2.37J/K
D.
Δ S L = -35.86J/K, Δ S R = 38.23J/K , Δ S = 2.37J/K